The Parsons told Dr. Phil Nan met them three times to drop her off at a McDonald's in Mooresville. The Parsons also said they never went to Nan's house and don't have her phone number.

"I don't understand why Nan...doesn't get on the phone and let us know where they are so this stuff would stop," Casey said.

Law enforcement officials believe Nan doesn't exist, and the real grandmother died five years ago.

Erica's 20-year-old brother reported her missing in late July, saying he hadn't seen her since Nov. 19, 2011. Casey said her son alleged to authorities the parents killed Erica, dismembered her and buried her in the back yard.

"Honestly I felt like I'm in this nightmare. Everything I've been accused of is a lie," Casey Parsons said.

Casey told Charlotte media outlets the son wanted payback for being kicked out of the house after a fight.

The second part, which includes a polygraph test according to promotion materials, airs Wednesday at 3 p.m. on WXII12.

Erica's parents haven't been charged in connection with her disappearance. However, they were issued a civil summons regarding the custody of their younger children. The Department of Social Services temporarily placed those children with their maternal grandmother as the investigation continues.

Investigators searched the home last week and found red-stained floors and walls near a closet, according to a search warrant. A section of the wall was removed for blood analysis.

Investigators also found a book about JonBenet Ramsey's 1996 murder that included notes about home remodeling, as well as a bag of magazines related to JonBenet's still unsolved case.

A search warrant alleges money was the motive for not reporting Erica's disappearance earlier.